The White River is the troop's main way of travel, as well as its main source of freshwater. The river cuts through the territory, dividing it into two large sections, but it also cuts through the Forgotten Forest. This allows the members of Troop Galaxia to leave the territory by way of boat and offers some defense, as outsiders have to approach by the river or they could get lost in the forest.
The waters of the White River are usually calm, but the currents can get very strong, especially once you pass the bridge that Troop Galaxia members use to access the gardens and part of their hunting grounds. Swimming beyond that point is not advised, as there's a chance you can get swept into the abyss below the Dreamscape.